Most Popular

Cut Risk On Your Outdoor Run . . .

. . . with help from Reed Ferber, Ph.D., who heads the University of Calgary's running injury clinic, and Linsey Marr, Ph.D., who teaches environmental engineering at Virginia Tech.

1. Air control: Don't run between noon and 5 p.m., when summer air is most polluted (and can inflame your airways). Check current conditions at airnow.gov. 2. Corner turn: No need to jog in place at a traffic light; your muscles don't cool that fast. Or just turn the corner and go.

3. Split slopes: Roads are angled, and running on them strains your pelvis. Balance it out: Whichever direction you run, double back on the same side of the street.